Preparation and Application of TiO2 Nanotube Array Gas Sensor for SF6-Insulated Equipment Detection: a Review

Zhang, Xiaoxing; Gui, Yingang; Dong, Xingchen

doi:10.1186/s11671-016-1516-4

Cited by 50 publications

(24 citation statements)

References 42 publications

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“…The team also discussed TiO 2 nanotube arrays and the adsorption of SO 2 , SOF 2 , and SO 2 F 2 on different surface of TiO 2 . The gas sensing responses of Pt, Au-modified TiO 2 are better than pure TiO 2 (Zhang et al, 2016). Although the most of present studies focus on the TiO 2 and carbon nanotubes, the hollow structure and density functional theory calculations can inspire further research on the detection of SF 6 decomposing products.…”

Section: Gas Sensing Mechanismmentioning

confidence: 96%

Synthesis of Hollow Nanofibers and Application on Detecting SF6 Decomposing Products

Zhou

Wei

et al. 2019

Front. Mater.

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Hollow structured nanofibers have attracted much attention in diverse domains owing to their unique physicochemical properties and characteristics. Gas sensing is one of the most promising applications. In electrical engineering, the detection of SF 6 decomposing gas products is significant to monitor the insulation status online of gas insulated switchgear (GIS). This mini-review presents the developments of hollow structured nanofibers in synthesis strategies and gas sensing application, especially in the detection of SF 6 decomposing gas products, including hydrogen disulfide (H 2 S), sulfur dioxide (SO 2), thionyl fluoride (SOF 2), and sulfuryl fluoride (SO 2 F 2). In addition, the gas sensing mechanism of metal oxide hollow nanofibers based gas sensor are discussed.

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Section: Gas Sensing Mechanismmentioning

confidence: 96%

Synthesis of Hollow Nanofibers and Application on Detecting SF6 Decomposing Products

Zhou

Wei

et al. 2019

Front. Mater.

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“…For the past few years, it has become the new trend to develop the pint-sized gas-detecting device by using the gas-sensing technology, which is aimed at achieving on-line monitoring to dissolved gas in transformer oil and grasping the operational state of equipment at any time [11,12]. On-line monitoring of dissolved gas analysis could help reduce the unavailability of equipment in the long run-time [13], thus it can improve the economic benefit, optimize cycle and content of maintenance job to decrease maintenance fee and improve control of power system and the reliability of monitoring performance in overload operation [14].…”

Section: The Significance Of Dissolved Gases Detection In Oil-insulatmentioning

confidence: 99%

Experimental Analysis of Modified CNTs-Based Gas Sensor

Tang¹,

Zhang²,

Xiao³

et al. 2017

Electrochemical Sensors Technology

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As a significant equipment in power system, the operation condition of transformers directly determines the safety of power system. Therefore, it has been an indispensable measure to detect and analyze the dissolved gases in transformers, aiming to estimate the early potential faults in oil-insulated transformers. In this chapter, the adsorption processes between modified carbon nanotubes (CNTs) (CNTs-OH, Ni-CNTs) and dissolved gases in transformers oil including C 2 H 2 , C 2 H 4 , C 2 H 6 , CH 4 , CO, and H 2 have been simulated based on the first principle theory. Meanwhile, the density of states (DOS), adsorption energy, charge transfer amount, and adsorption distance of adsorption process between CNTs and dissolved gases were calculated. Moreover, two kinds of sensors, mixed acid-modified CNTs and NiCl 2 -modified CNTs, are prepared to conduct the dissolved gases response experiment. Then, the gas response mechanisms were investigated. Finally, the results between response experiment and theoretical calculation were compared, reflecting a good coherence with each other. The CNTs gas sensors possess a relatively high sensitivity and fine linearity, and could be employed in dissolved gas analysis equipment in transformer.

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“…However, partial discharge and disruptive discharge might occur in GIS equipment during the long run, accounting for the SF 6 gas decomposing to various decomposition components, such as H 2 S, SO 2 , SOF 2 , SO 2 F 2 (Tsai, 2007; Liu et al, 2017). Previous researches have reported that these typical decomposition components are able to accelerate the corrosion rate of the GIS equipment and increase the paralysis possibility of the power system (Zhang X. et al, 2016; Li et al, 2017). Therefore, accurate and effective detection of SF 6 gas decomposition components is significant to estimate and optimize the operation state of GIS power equipment.…”

Section: Introductionmentioning

confidence: 99%

Electrospun ZnO–SnO2 Composite Nanofibers and Enhanced Sensing Properties to SF6 Decomposition Byproduct H2S

Zhou

Wang

et al. 2018

Front. Chem.

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Hydrogen sulfide (H2S) is an important decomposition component of sulfur hexafluoride (SF6), which has been extensively used in gas-insulated switchgear (GIS) power equipment as insulating and arc-quenching medium. In this work, electrospun ZnO-SnO2 composite nanofibers as a promising sensing material for SF6 decomposition component H2S were proposed and prepared. The crystal structure and morphology of the electrospun ZnO-SnO2 samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. The composition of the sensitive materials was analyzed by energy dispersive X-ray spectrometers (EDS) and X-ray photoelectron spectroscopy (XPS). Side heated sensors were fabricated with the electrospun ZnO-SnO2 nanofibers and the gas sensing behaviors to H2S gas were systematically investigated. The proposed ZnO–SnO2 composite nanofibers sensor showed lower optimal operating temperature, enhanced sensing response, quick response/recovery time and good long-term stability against H2S. The measured optimal operating temperature of the ZnO–SnO2 nanofibers sensor to 50 ppm H2S gas was about 250°C with a response of 66.23, which was 6 times larger than pure SnO2 nanofibers sensor. The detection limit of the fabricated ZnO–SnO2 nanofibers sensor toward H2S gas can be as low as 0.5 ppm. Finally, a plausible sensing mechanism for the proposed ZnO–SnO2 composite nanofibers sensor to H2S was also discussed.

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Preparation and Application of TiO2 Nanotube Array Gas Sensor for SF6-Insulated Equipment Detection: a Review

Cited by 50 publications

References 42 publications

Synthesis of Hollow Nanofibers and Application on Detecting SF6 Decomposing Products

Synthesis of Hollow Nanofibers and Application on Detecting SF6 Decomposing Products

Experimental Analysis of Modified CNTs-Based Gas Sensor

Electrospun ZnO–SnO2 Composite Nanofibers and Enhanced Sensing Properties to SF6 Decomposition Byproduct H2S

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